“She helped organize an outdoor activities evening for the local scouts on the beach,” a spokesman tells PEOPLE.

Kate has been quietly working with the local team of scouts for several months, often volunteering one evening a week when she is home in Angelsey.

It’s understood that this was one of several evenings organized by the volunteer members throughout the year.

A Scouts spokesperson tells PEOPLE, “It’s traditional at the end of term that scout groups celebrate the scouting year and look forward to the next one. Without volunteers like the duchess, events like this could not take place.”